Burson Audio Soloist 3X headphone amp opinions

I am considering the purchase of a Burson Audio Soloist 3X headphone amp. I currently have HiFiMAN HE-560 headphones and an Oppo HA-1 headphone amp. I also have a pair of Verum 2 headphones on order. The Verom 2 is only 12 ohms.

Does anyone here have a Burson Audio Soloist 3X and willing to share your opinion on it, or suggest any other headphone amps I should consider? I would prefer something with XLR inputs and both balanced and 1/4" headphone jacks. I would also prefer solid state over tubes.
Thanks.

Have not heard one, but this might interest you.